java 热键问题! 做下单步调试,应该可以看出问题在哪。有时间了,再帮你看看 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 加了热键以后,一级菜单就不响应了,还有二级菜单响应在 两个以上也有问题,也就是红字部分有问题!所以希望高手帮帮忙! import java.awt.*;import java.awt.event.*;//import java.io.*;import javax.swing.*;class word extends Panel implements ActionListener { TextField text = null; Button b = null; word() { text = new TextField(50); text.setEditable(false); b = new Button("Yes"); add(new Label("click the button then display some words")); add(text); add(b); b.addActionListener(this); } public void actionPerformed(ActionEvent e) { if (e.getSource() == b) { text.setText("this is a new window, welcome~"); } }}class MyCanvas extends Canvas { public void MyCanvas() { setSize(160, 160); } public void paint(Graphics g) { g.drawOval(20, 20, 15, 15); }}class ab extends java.applet.Applet implements ActionListener { Button b1; MyCanvas canvas; ab() { canvas = new MyCanvas(); b1 = new Button("circle"); b1.addActionListener(this); b1.setBackground(Color.cyan); add(b1); add(canvas); } public void actionPerformed(ActionEvent e) { if (e.getSource() == b1) { canvas.MyCanvas(); canvas.setBackground(Color.yellow); canvas.repaint(); } }}class Win extends JFrame implements ActionListener { JMenuBar bar = null; JMenu menu = null; JMenu menu2 = null; JMenuItem item1,subMenuItem1,subMenuItem2; word w; ab a; Win() { super("Using JMenus"); bar = new JMenuBar(); menu = new JMenu("choice"); menu.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { if(null!=a && null!=w) { w.removeAll(); a.removeAll(); } } }); bar.add(menu); menu.setMnemonic('c'); item1 = new JMenuItem("input words"); item1.setMnemonic('i'); menu.add(item1); // menu.addSeparator(); menu2 = new JMenu("file"); menu.add(menu2); subMenuItem1 = new JMenuItem("你好"); menu2.add(subMenuItem1); subMenuItem1.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_0,ActionEvent.CTRL_MASK)); subMenuItem2 = new JMenuItem("再见"); menu2.add(subMenuItem2); JMenuItem exitItem = new JMenuItem("Exit"); exitItem.setMnemonic('x'); exitItem.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { System.exit(0); } }); menu.add(exitItem); setJMenuBar(bar); item1.addActionListener(this); subMenuItem1.addActionListener(this); subMenuItem2.addActionListener(this); w = new word(); a = new ab(); setVisible(true); setBounds(100, 100, 100, 100); } public void actionPerformed(ActionEvent e) { if (e.getSource() == item1) { add(w, "Center"); validate(); } else if(e.getSource()==subMenuItem1 ) { add(a, "Center"); validate(); } else { JOptionPane.showMessageDialog(Win.this, "what are you doing!?", "再见",JOptionPane.PLAIN_MESSAGE); } }}public class laiqu_1 { public static void main(String args[]) { Win win = new Win(); win.setBounds(0, 0, 500, 500); win.setVisible(true); win.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); }}//建议你学学新的JDK,你的方法里有一些是过时的,但不属于错的。还有你的格式很有问题,注意养成良好的习惯。//这种问题你应该去J2SE里问 jsp跳转时 无法显示网页,可能是网络问题或404错误! 关于jms出现的bug,谁能解决呢? 页面跳转后JS控制下拉框默认值!不散分,在线等!急 请问:在weblogic923下读取中文数字证书主题的时候,却出来的中文为“?”,怎么解决?谢谢 求n72手机铃声设置程序 jsf制作增加text文本框的问题~! Jini已经死了? 请问tomcat-4.1.18在那晨下载.baidu的都找不到啊.谢谢! java如何调用可变返回值的储存过程??? 用XML做网站的问题? hibernate select查询struts2标签显示问题 java 调用net webservice传入参数问题
import java.awt.event.*;
//import java.io.*;import javax.swing.*;class word extends Panel implements ActionListener {
TextField text = null;
Button b = null; word() {
text = new TextField(50);
text.setEditable(false);
b = new Button("Yes");
add(new Label("click the button then display some words"));
add(text);
add(b);
b.addActionListener(this);
} public void actionPerformed(ActionEvent e) {
if (e.getSource() == b) {
text.setText("this is a new window, welcome~");
}
}
}class MyCanvas extends Canvas {
public void MyCanvas() {
setSize(160, 160);
} public void paint(Graphics g) {
g.drawOval(20, 20, 15, 15);
}
}class ab extends java.applet.Applet implements ActionListener {
Button b1;
MyCanvas canvas; ab() {
canvas = new MyCanvas();
b1 = new Button("circle");
b1.addActionListener(this);
b1.setBackground(Color.cyan);
add(b1);
add(canvas);
} public void actionPerformed(ActionEvent e) {
if (e.getSource() == b1) {
canvas.MyCanvas();
canvas.setBackground(Color.yellow);
canvas.repaint();
}
}}class Win extends JFrame implements ActionListener {
JMenuBar bar = null;
JMenu menu = null;
JMenu menu2 = null;
JMenuItem item1,subMenuItem1,subMenuItem2;
word w;
ab a; Win() {
super("Using JMenus");
bar = new JMenuBar();
menu = new JMenu("choice");
menu.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
if(null!=a && null!=w)
{
w.removeAll();
a.removeAll();
}
}
});
bar.add(menu);
menu.setMnemonic('c');
item1 = new JMenuItem("input words");
item1.setMnemonic('i');
menu.add(item1);
// menu.addSeparator(); menu2 = new JMenu("file");
menu.add(menu2);
subMenuItem1 = new JMenuItem("你好");
menu2.add(subMenuItem1);
subMenuItem1.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_0,ActionEvent.CTRL_MASK));
subMenuItem2 = new JMenuItem("再见");
menu2.add(subMenuItem2); JMenuItem exitItem = new JMenuItem("Exit");
exitItem.setMnemonic('x');
exitItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
System.exit(0);
}
});
menu.add(exitItem); setJMenuBar(bar); item1.addActionListener(this);
subMenuItem1.addActionListener(this);
subMenuItem2.addActionListener(this); w = new word();
a = new ab(); setVisible(true);
setBounds(100, 100, 100, 100);
} public void actionPerformed(ActionEvent e) {
if (e.getSource() == item1) {
add(w, "Center");
validate();
}
else if(e.getSource()==subMenuItem1 )
{
add(a, "Center");
validate();
}
else
{
JOptionPane.showMessageDialog(Win.this,
"what are you doing!?",
"再见",JOptionPane.PLAIN_MESSAGE);
}
}
}public class laiqu_1 {
public static void main(String args[]) {
Win win = new Win();
win.setBounds(0, 0, 500, 500);
win.setVisible(true);
win.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}//建议你学学新的JDK,你的方法里有一些是过时的,但不属于错的。还有你的格式很有问题,注意养成良好的习惯。
//这种问题你应该去J2SE里问